2281651 has 2 divisors, whose sum is σ = 2281652.
Its totient is φ = 2281650.
The previous prime is 2281619. The next prime is 2281661. The reversal of 2281651 is 1561822.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 2281651 - 25 = 2281619 is a prime.
It is equal to p168271 and since 2281651 and 168271 have the same sum of digits, it is a Honaker prime.
It is not a weakly prime, because it can be changed into another prime (2281661) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140825 + 1140826.
It is an arithmetic number, because the mean of its divisors is an integer number (1140826).
22281651 is an apocalyptic number.
2281651 is a deficient number, since it is larger than the sum of its proper divisors (1).
2281651 is an equidigital number, since it uses as much as digits as its factorization.
2281651 is an evil number, because the sum of its binary digits is even.
The product of its digits is 960, while the sum is 25.
The square root of 2281651 is about 1510.5134888507.
The cubic root of 2281651 is about 131.6486485697.
The spelling of 2281651 in words is "two million, two hundred eighty-one thousand, six hundred fifty-one".